chore vs duty

chore and duty both are nouns.

Word	Noun	Adjective	Verb	Adverb
chore	Yes	No	No	No
duty	Yes	No	No	No

As nouns, duty is a hypernym of chore; that is, duty is a word with a broader meaning than chore:

chore: a specific piece of work required to be done as a duty or for a specific fee
duty: work that you are obliged to perform for moral or legal reasons

chore (noun)	duty (noun)
a specific piece of work required to be done as a duty or for a specific fee	the social force that binds you to the courses of action demanded by that force
	work that you are obliged to perform for moral or legal reasons
	a government tax on imports or exports